AC 3387 - Why are there appearances of truths?

AC 3387 [2]
Truths or appearances of truth are given a person to the intent that
Divine good may be able to form his understanding,
thus the person himself.
For truths exist to the end that good may flow in;
for without vessels or receptacles
good finds no place, because it finds no state corresponding to itself;
and therefore where there are no truths,
or where they are not received,
there is no rational or human good,
consequently the person has no spiritual life.
In order therefore that a person may nevertheless have truths,
and thereby have spiritual life,
appearances of truth are given to every one according to his understanding;
which appearances are acknowledged as truths,
because they are such that Divine things can be in them.